From: Marco Costalba <mcostalba@gmail.com>
Date: Sun, 7 Mar 2010 08:02:34 +0000 (+0200)
Subject: Use separated research counters in root_search()
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=c835ee88535e138a4a5870f18a1cebab96476cf7;hp=c835ee88535e138a4a5870f18a1cebab96476cf7

Use separated research counters in root_search()

One for failing highs and one for failing lows, this
should reduce average window size in case of positions
that fail first high and then low (or the contrary).

After ~2000 games on Joona's quad we have:

Mod - Orig: 1012- 975 (+6 elo)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
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